Diamond Cut

Of the four C’s, diamond cut is the only one that can actually be controlled. The right cut can transform a rough stone into a beautiful gem.

How Cut & Brilliance Interact

It is best to get an ideal cut as a shllow or deep cut can detract rom your diamond's brilliance.The brilliance of diamonds is determined by the width, depth, roundness, and uniformity of facets. When light enters a diamond, it reflects off the many facets of the stone. This reflection is what gives diamonds their brilliance and sparkle. The quality of the cut of diamonds is determined by the angles in the facets as they relate to the other facets on the top and bottom of the stone. To have a proper cut, loose diamonds must also have correctly-proportioned top and bottom portions. A diamond that is cut too shallow or too deep will reduce the amount of light that reflects off the stone, thus causing the diamond to lose its brilliance. Lastly, diamonds that are cut well will have a flat upper surface, called the table, that is the correct size in relation to the overall size of the stone. The bottom line is this-a well-cut diamond will maximize the amount of reflected light. A poorly-cut diamond will allow light to escape out of its sides and bottom, thereby reducing the brilliance of the diamond. Knowing this simple rule can help you select the best loose diamonds and diamond jewelry.

What Comprises a Diamond’s Cut

Several facets comprise the cut of a diamond. Here is a list and an explanation of each:

Examples of the various terms associated with the cut of a diamond.

  1. The diameter - width of the diamond, measured through its girdle (widest part).
  2. The depth - height of the diamond, measured from the table (flat upper surface of the stone) to the culet (bottom point).
  3. The table - flat portion on the top of the diamond and the largest facet on the stone
  4. The girdle - outer edge of the diamond and the widest part of the stone. The girdle is rated according to its thickness. Ideally, you want a girdle that is neither too thick nor too thin.
  5. The crown - portion of the diamond that extends from the top (table) to the girdle (middle)
  6. The culet - bottom point of a diamond. Frequently, it contains a very small facet. The smaller the culet is, the better.
  7. The pavilion - portion of the diamond that extends from the girdle (middle) to the culet (bottom).

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